Screen for centrifugal baskets.



. ROBERTS.

SCREEN FOR CENTRIFUGAL BASKETS.

APPLICATION FILED AUG.19, 19H.

Patented Nov. 16, 1915.

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EUGENE ROBERTS, OF SALT LAKE CITY, UTAH, ASSIGNOR TO SUGAR CENTRIFUGAL DISCHARG-ER COMPANY, OF SALT LAKE CITY, UTAH, A CORPORATION OF UTAH.

I SCREEN FOR GENTRIFUGAL BASKETS.

To all whom it may concern:

Be it known that I, EUGENE ROBERTS, citizen of the United States, and resident of Salt Lake City, county of Salt Lake, State of Utah, have invented certain new and useful Improvements in Screens for Centrifugal Baskets, of which the following is a specification.

This invention relates to screens for cen trifugal baskets of the type disclosed in the joint application of myself and Angus H. Gibson, Serial NO.'74:8,114:, now pending in the United States Patent Ofiice.

In the form of screen shown in the aforesaid application the overlap for one of the interlocking edges of the perforated screen was formed by bending back one end edge of the screen along the line of a series of longitudinal perforations or slots, these slots being located directly in the extreme edge face of the fold. The present invention is characterized by a slightly different location of the perforations or slots and also by the use of a separate lapping or holding strip formed with considerably larger perforations than the perforations in the body of the screen. Moreover, in the present case in order to increase the durability of the screen, the edge in which the overlapping tongues are formed is beveled down to an extremely thin edge, the overlapping and underlying portions of the cooperating overlapping strip being similarly beveled so that the thickness of the overlapped parts is materially reduced, and avoids the formation of any abrupt shoulder which tends by its pressure against the body of the screen or basket lining to have a cutting or shearing action.

These and other features of the invention will be particularly disclosed in the following specification and will be defined in the claims annexed thereto.

In the accompanying drawingsFigure 1 is a perspective view of the screen as it is assembled for use in the basket; Fig. 2 is an enlarged detail view showing portions of'the two interlocking ends of the screen slightly separated preparatory to their being interlocked; Fig. 3 is an enlarged detail view showing the overlapped end portions of the screen in interlocking position; Fig. 4 is an edge view of the part shown in Fig, 2; Fig.

5 is a crosssectional view indicated by broken line 55 on Fig. 3; Fig. 6 is a ver- Specification of Letters Patent. Patented N 16 191,51 Application filed August 19, 1914. Serial No. 857,524.

tical section on i the plane indicated by broken line in Fig. 2.

In the practice of this invention one of the interlocking end portions a is provided with the circumferentially extended slots to form relatively narrower penetrating tongues 41/ alternating with wider overlving portions of, the entire edge being beveled to a very thin knife-edge, as indicated in Fig. 5.

The cooperating interlocking end portion 6 has soldered or otherwise secured to its outer face, a vertical looking or overlapping strip 1), which at a slight distance from its edge is formed with a series of vertical slots 6 arranged to aline with and receive the beveled tongues a. Those portions of the strip 6 which lie beyond the slots 6 are slightly raised or offset, as shown at 72 to provide room underneath for the interlocking tongues a which are inserted between the offset portions and the underlying body of the screen.

The overlapping strip 5, it will be noticed, is provided with a series of perforations much'larger than the normal perforations of the screen body, the object being to provide the least possible obstruction to the circulation or passage 'of the juice through the overlapping members. It is also to be noted, as shown in Figs. 4 and 5, that the edge portion of the overlapping strip 6, farthest from the end edge of the screen, is also beveled to a very thin edge. This beveling compensates in a measure for the extra thickness due to the overlapping of the members at this point and prevents the leaving of a thick shoulder or ridge which, under the pressure of actual service, would be likely to shear or punch a hole through the screen or the basket lining, and in this way the life1 of tlie screen and the ining 1s great y pro on e What I claim is: g y

1. A screen for a centrifugal basket embracing, a foraminous sheet having one end edge slotted transversely of its edge to form a series of locking tongues, a vertical body portion of the foraminous sheet, the intervenmg edge portions formed between said tongues being extended outside of the which is slotted to form a series of locking tongues, a vertical strip provided with perforations oflarger size than those of the foraminous sheet and secured over the other end portions of said sheet, said strip having at intervals opposite the locking tongues raised .or oflset ortions terminating near the end edge of t e sheet, vertical slots disposed to receive the locking tongues to allow said tongues to project beneath the raised portions of said strip.

3. A screen for a centrifugal basket embracing, a foraminous sheet one end of which is tapered toward its edge and is slotted inwardly to form a series of locking tongues, reinforcing foraminous strip secured over the other end of said sheet and formed with raised portions to receive the locking tongues through vertical slots at the edges of said raised portions, the farther edge of said strip being tapered to a thin edge whereby the formation of abrupt shoulders by the overlapped portions of the strip and the locking tongues is prevented, substantially as described.

4. A screen for centrifugalbaskets embracing a foraminous sheet one of whose ends is slotted inwardly from its edge to form separate locking tongues, a reinforcing locking strip secured over the opposite end of the sheet and being provided with separate vertical slots to allow the locking tongues to pass between said strip and the underlying end portion of said sheet, said strip being provided with perforations of substantially larger size than those of the foraminous sheet in order to facilitate passage of the liquid through the overlapped ends of the screen substantially as described. In witness whereof, I have subscribed the above specification. I

' EUGENE ROBERTS. In the presence of- GEORGE F. KENNY, WM. 0. SHERWOOD. 

